Method of and mechanism for knotting together strands



Sept. 30, 1930. F. KL EIN 1,776,912

METHOD OF AND MECHANISM FOR KNOTTING TOGETHER STRANDS Filed April 11, 1929 7 Sheets-Sheet l Sept. 30, 1930. F. KLEIN 1,776,912

METHOD OF AND MECHANISM FOR KNOTTING TOGETHER STRANDS Filed April 11, 1929 '7 Sheets-Sheet 2 A TTOR/VEV Sept. 30, 1930. E N 1,776,912

METHOD OF AND MECHANISM FOR KNOTTING TOGETHER STRANDS Filed April 11. 1929 7 Sheets-Sheet 3 F. KLEIN Sept. 30, 1930.

umaoo 01 AND MECHANISM FOR KNOTTING TOGETHER swam s Filed April 11, 1929 7 Sheets-Sheet INVENTQR 'P- leiaKK'leln,

A TTORNEY F. KLEIN Sept. 30, 1930.

METHOD OF AND MECHANISM FOR'KNOTTING TOGETHER STRANDS '7 Sheets5heet Filed Apl il 11, 1929 INVENTOR I. e m.

ATTORNEY Sept. 30, 1930. F. was 1,776,912

METHOD OF AND MECHANISM FOR KNOTTING TOGETHER STRANDS Filed April 11, 1929 7 Sheets-Sheet 6 INVENTOR Trad erz'ck. h lath.

BY M

ATTORN EY Sam 30, 1930. F. KLEHN 3,776,912

METHOD OF AND MECHANISM FOR KNOTTING TOGETHER ETRANDS Filed April 11, 1929 7 sheets-sheet 7 M/VENTUR 'Frcdvxr k K145 ATTORNEY Patented. Sept. 30, 1930 1 UNITED STATES PATENT OFFICE FREDERICK KLEIN, OF COLLEGE POINT, NEW YORK, ASSIGNOR TO WARP TWISTING-IN MACHINE COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK METHOD OF AND MECHANISM FOR KNOT'TING TOGETHER STRANDS Application filed April 11,

This invention relates to the method of and mechanism for uniting two threads or other strands by a knotand particularly by what is known as a weavers knot, in which one strand has a loop therein and the other extendsthrough this loop, then crosses the two legs of such loop at the same side at which it enters the same and then extends between itself and the loop at the other side of the same.- In generahthe object is to provide a reliable and efficient mechanism for tying knots of this character however fine in quality the strands to be united may happen to be, as for example silk threads to compose the warp ina fabric. More specifically, the object is to provide a mechanism for tying such knots which'may he used in the stead of the twisting mechanism of a machine for uniting warp threads of the class represented by United States Patent No. 1,690,157 and those therein mentioned and in cooperation with the other instrumentalities of such a machine concerned in the selection and proper feeding of the strands or threads of the two warps (old and new) successively from such warps, it being recognized that certain strands cannot be twisted together properly and must be united by knotting, as those characterizing the fabric known as Georgette.

In the drawings,

Figs. 1 to 5 are diagrammatic views i1lus'-.

trating the method of tying a weavefis knot in accordance with this invention;

Figs. 6, 7 8 and 9 illustrate in front clevation and Figs. 6, 7, 8 and 9, in plan, how the two strands become crossed asin Fig. 2;

Figs. 10, 11 and 12 illustrate how, with the assistance of what I term the first loop-former shown in front elevation, a second crossing is effected and the first loop produced;

Fig. 13 is a front elevation of the first loopformer, the knot-tyer and the second loopformer, all in their retracted positions, and

the main cam;

Fig. lil is a similar view showingthe second loop-former still retracted and the knottyer in its partially advanced position;

a Fig. 14 is a similar view showing the sec ond loop-formerpartially advanced and the knot-tyer in its fully advanced position;

1929. Serial No. 354,309.

Fig. 15 shows the first loop-former and the knot-tyer as in Fig. 14 and the second loop-former, in section, in its advanced position, having produced the second loop;

Fig. 15" is a plan view of the knot-tyer parts;

Fig. 16' is a fragmentary front elevation of the knot-tyer after having severed one strand and gripped it preparatory to tying the knot;

Fig. 17 is a. horizontal sectional view on line 17-17, Fig. 15;

Fig. 18 is a front elevation of the knot tying mechanism. the parts appearing in the positions assumed thereby which correspond to the showing of Fig. 14;

Fig. 19 is a front elevation, partly'in section, of the second loop-former and mechanism for effecting its movements;

Fig. 19 is an elevation of the periphery of cam 14 showing the form of its camway 14;

Fig. 20 is a plan, partly in section, of what is shown in Fig. 19, and also parts seen in Figs. 13, 14, 15 and 18;

Fig. 21 is a left-hand elevation of certain parts appearing in 19;

Fig. 22 is a section on line 22-22. Fig. 19;

Fig. 23 is a plan, partly in section, of the gripper for one strand and the combined gripper and cutter for theother;

Fig. 24 is a plan, partly in section. showing the mountings for the second loopformer;

Fig. 25 shows a machine embodying the improved knot-tying mechanism and, with certain guides of a fork shown in Figs. 6 to 9 and 6 to 9", instrumentalities for supporting two warps, old and new, and selecting and advancing therefrom the strands to be united by said mechanism; and

Figs. 26 and 9.7 are a front elevation and plan of the machine and the two supply beams, and show the relation of these parts to each other.

lVhere, as in accordance with my specific-v object, a machine embodying my knottmg opposite directions to their supply beams A (Figs. 26 and 27), and the strands released in pairs (one from each warp) successively by the means 3 will by the (spiral) means 4 be successively fed forward, being delivered a pair at a time to the guides 5-6 (Figs. 1 to 4) formed as the terminals of said fork, the fork receiving reciprocation from the cam 7 on the shaft of the means 4, all as in the patents hereinbefore mentioned. My mechanism is incorporated in the place of the fixed and rotating members of the twisting means of the mentioned patents, to wit, it is supported by the fixed shaft 8 and the rotating shaft 9 geared with the shaft of means 4 as shown at 10, shaft 9 also affording the mediumfor driving a certain cam which actuates the moving parts of the knotting mechanism as will appear.

As will hereinafter appear,e.ach two strands delivered to the guides 56 undergo the manipulations shown in Figs. 1 to 5 in order to form the knot. While the strands are still engaged with the fork 2 the strands, a and Z), are .crossed, strand (1 being transferred to guide 6, as in Fig. 2. This is accomplished as follows (Figs. 6 to 9 and 6 to 9) Both guides terminate in approximate coincidence with each other and guide 5 has its terminus crossingover guide 6 and slightly hooked. A spiral cam 11 rotating with shaft 9 engages the horizontal stretch of strand a and shifts it forward until it is caught in the strand-detainer formed by said hook,f5 of guide 5 and stands in crossing relation to guide 6 (Fig. 7) over whichit extends in a bend as shown in Fig. 7 because of the downward and forward pressure thereon at that time of the cam 11'. Further rotation of said cam, with still further downward and forward pressure on said strand a, will clear it from above the point of the guide 6, and the strand under the strain tending to straighten as soon as the cam now rotates clear of said strand the latter is left free to catch under the guide 6 (Figs. 9 and 9). This operation resolves itself into transferring a strand, as a (which is held tensioned by what I term the primary holding means-clamp 1-and the secondary holding means-the warp supply beams) from guide 5 to guide 6, and if another strand, as b, is present stretched in the manner shown between means, as the clamp and guide 6, the crossing of the two strands will be a necessary incident of such transfer. This crossing is necessary in the example, where we start with the strands arranged as in Fig. 1 (or in the arrangement described above and peculiar to and common in the machine shown by Fig. 25) in order to form a loop in one thread which receives the other and thereby produces a hitch (Fig. 3), as will appear. It will be noted that in Fig. 3 there has been a passing of a portion of one strand around a portion of the other of substantially one complete revolution, with substantially complete turns at w and y.

'hen the foregoing operations ensue the fork 2 is retracted and practically at a stand still, but as soon as the crossing is effected it undergoes forward movement under the influence of the cam 7 and, holding the two strands, it advances them into the reach of the knotting, mechanism (Fig. 18) whose frame 12 is secured to shaft 8 by the screw 13 and in which is a cam 14 whose hub 14 is fitted over and secured to the shaft 9 which thus rotates cam 14.

On delivery of the two threads in the reach of the knotting mechanism they will be separated (Figs. 10 and 13) by a tapering point 15 which projects laterally of a hook 16 forming the first loop-former and carried by, and extending substantially in an are around the center of movement of, the lever 17 fulcrumed in the frame 12 at 17*. This lever 17 is oscillated from the knot-tyer, as will appear, which, after the threads .have assumed the mentioned position shown in Fig. 10, in its descent causes said lever and hence the first loop-former to shift to the left in Fig. 13, said point 15 camming the strand a outward of the extremity of the hook 16 while the hook itself draws the strand 1) to the left in the manner shown in Fig. 12, thus crossing the two strands again and forming in the strand 7) the first loop I), as seen in Figs. 3, 4, 14 and 15. It will be noted that strand a (Fig. 3) extends through the loop 6 of strand 11, forming a hitch.

The bill of the knottyer (which as will appear is fulcrumed to the right of the fork guide 6. still engaged with and holding both strands) as the hitch is formed passes in its descent between said loop and the adjoining upwardly extending portion of a strand a preparatory to the forming of a second loop, in strand a, as the next step in the evolution of the knot. The parts of the knot-tyer are as follows: 18 is a lever fulcrumed on a stud 19 (eccentrically related to a revoluble adjusting member 19 arranged in the frame) and engaged at 18 with a cainway 14 in the front face of cam 14, the lever having two reverse angular bends as seen in plan (Fig. 20) so that its two end portions are in offset planes, the fulcrum end in front and the free end at the rear of the cam. This leverhas a stud 18? engaged in the fork 17 of lever 17, so that the two move on their fulcra in unison. The free end of this lever 18 is directed downwardly, and alongside and forward of said free end is an elbow piece 20 which is attached to lever 18 by stud 18 and is kept from oscillation on said stud by a lug 22 engaged in a notch 23 in said lever. (In other words the piece 20 may be regarded as a part of lever 18, whose free end portion is thus binary in form and in fact bifurcated in plan, Fig. 15). The lower termini of the free ends of lever 18 and piece 20 form the under jaw of the bill of the knot-tyer and they respectively have the shear-edge 18 and rounded edge 20 (Fig. 17). Piece 20 further has at its left side as seen from the front a downwardly extending hook 20 whose free end is bent rearwardlyout of the plane of the piece itself. Fulcrumed on stud 18 between parts 18 and 20 is an elbow lever 24 which extends over the bend in lever 18 and down behind cam 14 with which it is engaged in a groove 14 in the rear face of the same. Parts 18, 20 and 24 are clamped face to face by a springwasher 25. Lever 24 forms the upper jaw of the said bill and its terminus is formed with a rearward shear-edge 24 and a forward rounded edge 24 which respectively cooperate, to shear and to grip, with the edges 18 and 20 hereinbefore mentioned (Fig. 17 It also has its left side formed with a shoulder 24 which in the open condition of the billis exposed but when the bill is closed becomes sheathed between parts 18 and 20 (Fig. 16).

At the end of the (simultaneous) downward movement ofthe lever 17 to form loop 6' and the descent (or what I term .the forward movement) of the knot-tyer so that its bill enters between said loop and the adjoining upwardly extending stretch of strand a the bill is in position tomaintain the aforesaid hitch that has been formed, so that the guide 6 may withdraw (with the hitch continuing to be held) ,as it now proceeds to do, which is obviously a matter of the proper timing of the camway 14 with respect to movementsbf the parts 2, 3 and 4. In the descent of the knot-tyer, while its bill passes,

as stated, forwardly of strand a, its hook 20 p'asses rearwardly thereof so that the latter at thecrotch formed at 20 is urged somewhat to the left in a bend (Fig. 13), for a purpose which will appear. At the end of their stated simultaneous movements (Fig.

14) the knot-tyer and lever 17 stand station-- ary, maintaining the hitch, while the forming of the second loop a"(in strand a) and tying of the knot are completed.

For the forming of the second loop there is the following means: A lever 26 has a fulcrum at the left of guide 6 permitting it to move forward and backward as well as up and down, for. this purpose fitting loosely on a headed stud 27 of frame 12 and having a ball-and-socket bearing 28 thereon which is maintained by a spiral spring 29 interposed between the lever and head of the stud. Lover 26 derives its up and down motion through a link 30 from a lever '31 which is fulcrumed on a stud 32 eccentrically related to a revoluble adjusting member arranged in the frame, thelever 31 being engaged with the camway14" at 31. The forward and back movement of lever 26, which has an'elongated front-to-rear-extending head 26", is obtained from a lever 34 fulat the rear end of its head 26*, projecting to the right (Figs. 14, 15 and 20). In the form ing of the second loop the second loop-former is first moved forward by camway 14, acting through lever 34, so that its hook ongages the upright stretch of strand a just above crotch 20 (which in the downward movement of the knot-tyer bent the strand to the left within the reach of the hook), and then downward by camway 14", acting through parts 3130, until said hook is below the hitch, the resulting loop a being left caught on the shoulder at 24 (Fig. 4).

(As will appear, the entire movement of lever 26 is forward, downward, backward, forward, upward and backward, it standing at dwell when up .and back and when down and back, excepting that while up and back, as in Fig. 13, it has a slight forward and back movement imparted to it by a bend 14 in eamway 14 so that strand 1) may clear it as it is drawn aside by loop-former 16 in the forming of loop 5').

Strand a (that is, its said loop) is next to be entered between the hereinbefore mentioned jaws of the kn-ot-tyer and thereby first gripped and then severed. \Vherefore, following its last-mentioned or downward movement, the second loop-former is by camway 14. acting through lever 34, caused to move backward, thus entering said portion of strand (1 between said'jaws. The .knot-tyer jaws are now closed on the strand by camway 14 acting to move lever 24 relatively to parts 18-20, with the result that the strand is first gripped at 2024 (Fig. 17) and then sheared at 1824, leaving the remnant of strand 11 hanging from the clamping means 1 as shown at if (Fig. 16), the loop a slipping off shoulder 24 on said shoulder strands should best be held near that point while the knotting operation is performed and also the tension thereon should be neutralized so that the loop-a shall not become constricted as the bill withdraws therefrom and before the bill can draw the severed end of the strand a sufficiently far through the loop so that it cannot slip back and allow the knot to collapse when, once tied, the united strands are stressed. Hence the following means, both operated, as will appear, from lever 34 when it causes the hook 26 to move rearward to enter strand a in the jaws of the knot-tyer bill and which it will be seen (Figs. 18 and 23) are so positioned that when the guides 56 of fork 2 advance the two strands to the position for knotting they stand both sides of the upright stretches thereof.

36 is a straight arm projecting rearwardly and having its front end 36 bent off and secured to the front face of frame 12 by a screw 37 (Figs. 18, 19, 21 and 23). Held against the left face of this arm by headed-stud-andslot connections 38 and 39 is a blade 40. The arm is under-cut and forms a forwardly facing shoulder at 36", whereas the blade is overcut at its rear end and forms a rearwardly facing shoulder at 40*. When the blade is fully forward the under-cut of the arm ,is fully exposed and a notch is therefore left to which the strand a may enter, the parts being so positioned with reference to the (tensioned) horizontal portion of said strand that the latter will of itself enter the notch. The shoulders 36 and 40 are rounded (the same as at 2()24 already described) so that on the closing of the notch by the rearward movement of the blade the strand will be simply gripped and held by them. The sliding movement of the blade is obtained from the lever 34, which at its free end has a depending hook portion34" between one side of which and a piece 41 secured to the lever the stud of the headedstud-and-slot connection 39 is received, so that in the described forward and back movement of said lever the blade moves forward and back with it; When,

therefore, the strand a is by the hook 26 en"- tered into the jaws of the knot-tyer bill by the mentioned rearward movement of the second loop-former the blade 40 is moved rearward to grip strand a, this occurring before the bill jaws close to grip and then cut said strand and the latter consequently becomes released from shoulder 24the object of the grip being to prevent the tension on strand a from causing the loop to'be taken up before the closed bill can draw the severed end of said strand a to an adequate extent through the loop.

A U-shaped bracket 42 is secured to the 1 48 with blade 44 between them, blade 48 having its rear end slotted and receiving the stud 43 and the two blades 47 and 48 having a stud 46. received by a slot 44 of blade 44. Blade 47 has at its rear end a shear edge 47 to coact with the shear edge 44 whereas blade 48 has a rounded edge 48 to coact with the rounded edge 44. WVhen theblades 47 and 48 are in their forward position they form with the blade 44 an upwardly open notch into which the first loop-former l6 enters a portion of loop 6 when it forms'such loop as in Fig. 15. The rounded edge 48 of blade 48 projects further to the rear than the shear edge 47 of blade 47, so that the rearward movement of the two blades effects first a gripping and then a shearing of the strand I) as said edges coact with the edges 44 and 44, substantially as already explained in connection. with the jaws of the knot-tyer bill. When, therefore, the hook 126 performs its rearward movement to enter the loop of strand a in the jaws of the bill on the mentioned rearward movement of the lever 34 the stretch of strand 1) between the first loop- ,former 16 and the hitch is first gripped and then severed by the coaction of the blades 44, 47 and 48, the grip being of course maintained until the knot is tied.

(The camways 14 and 14, controlling levers 18 and 24, respectively, are so formed and related to each other (Fig. 19) that in a cycle first lever 18 descends {while it then remains at standstill lever 24 is moved so that the jaws of the knot-tyer close and grip strand a, then while lever 24 is at standstill, lever 18 recedes, and then while 18 is at standstill lever 24 recedes. The consequence of this is that while the gripping'and later the severing of the stranda is effected by movement of the jaw of lever 24 toward the other two jaws, the release of the severed strand a from the knot-tyer is the result of receding movement of'lever 18 while lever 24 is still depressed and at-standstill.)

The following motions ensue, completing a cycle of the operation of the mechanism, while the knot-tyer is rising or receding, to wit: Lever 18 retracts as just parenthetically stated, releasing the stub or end of strand a; the devices gripping strands a and 6 laterally of the knot release them after such end of strand (1 has thus been released; the second loop-former lever 26 moves forward, up and back to its original position under influence of levers 31 and 34; and .the first loopformer of coursereturns to its original position with the knot-tyer.

@n the tying of the knot and release of the two strands by the two gripping devices the resulting, strand 0, knotted at 0, tends to assume under the tension a straight transverse line below and forward of the knotting mechanism (Figs. 26 and 27) and it will usually spring downward and forward to this position clear of said mechanism. If however, it should catch thereon a cast-off lever 49 having a strand-depresser 49 and oscillated from knot-tyer lever 18, through a link 50, will cause it to clear.

On each succeeding cycle of shaft 9 and hence of the cam 14' the then first or outward pair of strands will first undergo the first crossing operation (Figs. 6 to 9 and then be carried forward by the guide 6 to undergo all those described operations which begin with the second crossing and forming of loop I) by the first loop-former and end with the tying of the knot and the severing and release of the strands.

As hereinbefore noted, the knot-including strand 0 is under tension on the forming of the knot and its delivery. This is a most important feature because if on delivery this strand were allowed to be slack the projecting knot-ends c of this and the other (previously delivered) like strands would cause such entanglements therein (especially where the material is fine and of a nature'to encourage twisting of the strands around each other) as would make it difficult and frequentl impossible to draw the warp formed by suci strands through the heddles of the harness and other limited spaces in the loom.

My invention distinguishes from what is known in respect to the forming of a weavers knot in the following: That while the knotis being formed the portions of both strands which .go to form the knot are tensioned; that while one strand (as b) is held at points therein spaced from each other the strands are manipulated to form between said points a loop in said strand extending around the other and leave the latter strand extending around-one side of the loop and between itself and the other side of the loop; and that while one strand (as a) is held at points therein spaced from each other the strands are manipulated to form a loop in the other strand extending around the first strand between said points and leave the first strand extending around oneside of the loop-and between itself and the other side of the loop. Of course I claim these independently of each other.

, Having thus fully described my invention, what I claim is: v ,1. In combination, primary and secondary spaced means for holding a strand under tension while it is shifted laterally of itself between said means, aguide having a free end and projecting in the d1rect1on of such shifting cand engaged by said strand, a second guide having a free end and arranged beside and projecting in the same direction'as the first guide with the strand between them, the first guide crossing the second guide between the same and said primary means, and means to shift the strand along the first guide to the pointof crossing of the two guides and while it remains engaged with the first guide shift it along the second guide till it clears i the free end thereof.

2. In combination, primary and secondary spaced means for holding a strand under tension while it is shifted laterally of itself between said means, a guide having a free end and projecting in the direction of such shifting and engaged by thestrand, a second maintain it bent around and shift it along the other guide till it clears the'free end thereof.

3. The method of joining two strands tov gether which consists in forming a weavers knot in the two strands while maintaining tensioned bothof the portions of the two strands which go to form the knot.

4. The method of joining two strands together which consists in holding one of the strands at points therein both sides of the portion thereof which goes to form the knot,

and while so holding said portion manipulating the strands to form between said points and independently thereof a loop in the first strand extending around the other strand and leave the latter strand extending around one side of the loop and between itself and the other side of the loop.

5. The method of joining two strands to gether which consists in holding one strand.

at spaced points and as to the portion therebetween ina state of tension, and while so tensioning said portion manipulating the strands to form. in said portion and indepondently of said points a loop around the other strand and leave the latter strand extending around one side of the loop and between itself and the other side of the loop.

6. The method of joining two strands together which consists in holding one of the strands at points therein both sides of the portion thereof which goes to form the knot, and while so holding said str'and manipulating the strands to form a loop in the other strand extending around said portion and leave the first strand extending around one side of the loop and between itself and the other side of the'loop.

7. The method of joining two strands together which consists in tensioning one strand as to the portion thereof which is to go to form the knot, and while so tensioning said portion manipulating the strands to form a loop in the other strand extending around said portion and leave the first strand extending around one side of the loop and between itself and the other side of the loop.

8. The method of forming a weavers knot in and thus uniting two strands which consists in holding one strand at two spaced points and stretched, forming in the thus stretched portion of said strand independently of the points at which it is so held a loop around the other strand, and then passing the second strand around one side of such loop and between itself and the other side of the loop and drawing upon the second strand to complete the knot.

9. The method of forming a weavers knot in and thus uniting, two strands which consists in tensioning a portion of one strand, forming in said portion between the points of application of the tension and independently thereof a loop around the other strand, and then passing the second strand around one side of such loop and between itself and ,the other side of the loop and drawing upon the second strand to complete the knot.

10. The method of forming a weavers knot in and thus uniting two strands which consists in forming a loop in one strand around the other, holding the second strand at spaced points, bending the second strand between said points into a second loop and passing such second loop, independently of the points at which the second strand is held, around one side of the first loop, then passing the loop-forming portion of the second strand between itself and the other side of the first loop, and finally drawing upon said portion to complete the knot.

11. The method of forming a weavers knot in and thus uniting two strands which consists in tensioning a portion of one strand, forming in said portion between the points of application of the tension a loop around the other strand, holding the other strand at spaced points, bending the second strand be tween the latter points into a second loop and passing such second loop, independently of the points at which the second strand is held, around one side of the first loop, then passing the loop-forming portion of the second strand between itself and the other side of the first loop, and finally drawing upon said portion to complete the knot.

12. The method of forming a weavers knot in and thus uniting two strands which are held at spaced points in their lengths which consists in passing a port-ion of one strand.

between said points around the other one substantially complete revolution so as to format each of two points one substantially complete turn of one strand around the other, forming a loop in one strand at one such turn so that the loop will be penetrated by the other strand, and then passing the second strand around one side of the loop and between itself and the other side of said loop and drawing-upon the second strand to complete the knot.

13. The method of forming a weavers knot in and thus uniting two strands which are- 14. The method of forming a weavers knot in and thus uniting two strands which are held at spaced points in their lengths and so that limitedportions thereof between said pointsstand side by side which consists in passing one such portion around the other one substantially complete revolution so as to form at each of two points one substantially complete turn of one strand around the other, forming a loop in one strand at one such turn so that the loop will be penetrated by the other strand, and thenpassing said other strand around one side of the loop and between itself and the other side of the loop and drawing upon the latter strand to complete the knot.

15. The method of forming a weavers knot in and thus uniting two strands which are a both held at spaced points so that portions thereof between said points are side by side and initially uncrossed which consists in first shifting one strand to cross one such portion over the other at one point, then passing one strand around the other until there are formed therein a complete turn around the second strand at such point and another complete turn around the second strand at another point and forming at such other point a loop in the first strand penetrated by the second strand, and then passing the second strand around one side of the loop and between itself and the other side of the loop and drawing upon the second strand to complete the knot.

16. A weavers knot-forming combination including means to hold two strands with one looped around the other having a guide around which said loop is formed, said means v holding the other strand at a point remote from the loop, and mechanism to pass a portion of said other strand between said point and the loop around one side of the loop and then between itself and the other side of the loop while said other strand is so held at said point.

17. A weavers knot-forming combination including means to hold two strands with one looped around the other having a guide around which said loop is formed, said means holding the other strand at a point remote from the loop, and mechanism to pass a portion of said other strand between said point and the loop around one side of the loop and then between itself and the otherside of the loop while said other strand is so held at said point and thereupon sever said portion.

18. A weavers knot-forming combination including means to hold two strands with one looped around the other having a guide around which said loop is formed, said means holding the other strand at a point remote from the loop, and mechanism to pass a portion of said other strand between said point and the loop around one side of the loop and then between itself and the other side of the loop while said other strand is so held at said point and thereupon draw upon one strand until the knot is drawn up tight.

19. In combination, means to hold two strands side by side, a device movable in. a path crossing the strands one after the other and having a hook to catch and displace laterally the strand first approached by the hook and a projection enterable between the strands and formed to cam the other strand clear of the hook, and mechanism to first cause relative movement, one toward the other, as between the strands and said device to enter said projection between the strands and then cause said movement to said device.

20. In combination, means to hold two strands crossing each other including a guide around which and one strand the other strand is to be bent into a loop at the crossing, said guide having a free end, mechanism to bend the second strand into such loop around the guide and the first strand at said crossing and thereupon pass the first strand around one side of the loop and between itself and the other side of the loop, and means to effect after said loop is formed, a relative shift-ing, as between the guide and said mechanism, in the direction to clear the loop from said free end of the guide.

21. In combination, means to hold two strands crossing each other including a guide around which and one strand the other strand is to be bent into a loop at the crossing, said guide having a free end, means to bend said other strand into such loop around the guide and said first strandat said crossing, means thereupon to pass the latter strand around one side of the loop and between itself and the other side of the loop, and means to effeet, after said loop is formed, a relative shifting as between the guide and the last-named means in the direction to clear the loop from said free end of the guide.

22. Means to hold two strands, one of which strands is formed in a loop around the other and forms therewith a hitch, a guide having a free end and engaged with and adapted to hold the hitch in substantially fixed position, mechanism to pass the second strand around one side of the loop and between itself and the other side of the loop including a hitchholding member movable into position to hold the hitch in substantially fixed position. and means to cause relative movement, one from the other, as between said guide and member on the latter assuming hitch-holding position,

whereby said guide and hitch will thus clear each other.

23. Spaced means tohold one strand, means to hold a second strand in a loop penetrated by and forming a hitch with the portion of the first strand between said spaced means, a strand-gripping knot-tyer movable forward and back past the hitch and between the same and the stretch of the first strand at one side of said hitch, and means to pass a part of said stretch around the knotty-er and said loop and deliver said part into the grip of the knot-tyer before the latter completes its backward movement.

24. Spaced means to hold one strand, means to hold a second strand in a loop penetrated by and forming a hitch with the portion of the first strand between said spaced means, a strand-gripping knot-tyer movable forward and back past the hitch and between the same and the stretch of the first strand at one side of said hitch, and means to form a loop in said stretch and thereupon pass a part of the latter loop around the knot-tyer and the first loop and deliver said. part into the grip of the knot-tyer before the latter completes its backward movement.

25. Means to hold two strands tensioned and so that one is looped around and holds the other in an angular bend, a strand-gripping knot-tyer movable forward into proximity to the bend and then backward, and means to pass a part of the stretch of the second strand at one side of the bend around the knot-tyer and the loop and deliver said part into the grip of the knot-tyer before the latter completes its backward movement.

26. Means to hold two strands tensioned and so that one-is looped around and holds the other in an angular bend, a strand-gripping knot-tyer movable forward into proximity to the bend and then backward, and means to form a loop in the stretch of the second strand at one side of the bend and pass such loop around the knot-tyer and the loop of the first strand and deliver the same into the grip of the knot-tyer before the latter completes its backward movement.

27. Mechanism to form a noose in the tying of a knot including a device movable to draw through the noose one of the constituent strand portions having means on such movement first to grip and, while gripping, sever sa d portion.

28. In combination, means to hold two strands with a portion of each side by side with a portion of the other means to form in said portion of one such strand a loop which is penetrated by said portion of the other strand, and mechanism to pass said portion of the second strand around one side of such loop and between itself and the other side of the loop.

29. In combination, means to hold two strands with a portion of each side by side with a portion of the other, means to pass 'one such portion substantially one complete revolution around and thus form a loop therein around the other, and mechanism to pass said portion of the latter strand around one side of such loop and between itself and the other side of the loop.

30. In combination, a strand supply from which a strand extends with one end portion thereof free, means coactive with the supply to hold said portion tensioned, means to knot together said portion while so tensioned and another strand, and means, engageable with said portion near the knot, to hold said portion steady while the knot is being formed.

31. In combination, a strand-supply from which a strand extends with one end portion thereof free, means coactive with the supply to hold said portion tensioned, means to knot together said portion while so tensioned and another strand and draw up the knot tight,

and means to sever the said portion upon drawing up the knot tight.

32. The herein described method of forming a series of single strands by uniting strands of one set of strands with those of another set which consists in successively selecting strands in pairs, one from each set, and knotting the strands of each such pair together and delivering each two thus-joined strands. as a single strand in tensioned state as to its knot-including portion.

33. The hereindescribed method of forming a series of single strands by uniting strands of one set of strands with those of another set which consists in successively selecting strands in pairs, one strand from each set, and knotting the strands of each such pair together while maintaining each such strand as to the portion thereof which goes to form the knot in a state of tension and delivering each two thus-joined strands as a single strand while continuing said portions thereof in a state of tension.

In testimony whereof I atfix my signature.

FREDERICK KLEIN. 

